Roving frame



May 30, 1933. G F ASER' AL 1,912,072

ROVING FRAME Filed Dec. 21 1952 3 Sheets-Sheet l 6 HG 37M May 30, 1933.G. FRASER r AL 1,912,072

ROVING FRAME Filed Dec. 21, 1932 s SheetsSheet 2 May 30, 1933. G. FRASERET AL 1,912,072

ROVING FRAME Filed Dec. 21, 1932 3 Sheets-Sheet 3 hZ/enfi 2/5 1 PatentedMay 30, 1933 UNITED sTATEs PATENT oFFIcEf GORDON FRASER, NORMAN FRASER,AND Joint, FRASER, or ARBROAT'H, ANGUS,

. SCOTLAND novme FRAME Application filed December 21, 1932, Serial No648,298,2and in'Great Britain January 14, 1932.

This invention relates to improvements in roving frames of the type usedfor jute in which the bobbins are positively driven by gearing and hasfor its object to provide an improved dofiring arrangement for suchframes.

As is understood, in a jute roving frame the flyers are arranged in adouble row including a front row and a rear row.

A roving frame constructedin accordance with the present invention isequipped with flyers suspended from driven spindles journalled in afixed overhead rail and with a bobbin lifter rail adapted to be tiltedabout the axis of a bobbin-driving shaft extending longitudinally of thebobbin lifter rail intermediate the rows of bobbin-carrying spindles.

As is understood, in operative position the bobbin spindles are uprightand aligned with the axes of rotation of the relative flyers.

The arrangement is such that, when the flyers are stopped in a givenposition, both rows of bobbins can be swung through the flyers to aforwardly inclined position in which the full bobbins can be readilydoffed and replaced by empty bobbins.

Suitable power-driven or hand-driven inching apparatus may be providedfor bringing the flyers to the correct position to permit passage of thebobbins in case the flyers should fail to stop in the correct position;or the correct positioning of the flyers may be effected by directmanipulation of one of the flyers, it being understood that, when oneflyer is turned, all the other flyers are turned.

The gearing for driving the flyers may comprise spiral or bevel gears.The bobbins are differentially gear-controlled as in the usual juteroving frame.

According to a modified arrangement in which the bobbin spindles of eachrow are staggered relatively to the bobbin spindles of the other row, toenable the bobbins of the rear row to clear the front flyers whendofling, the bobbin lifter rail, in addition to being tiltable about theaxis of the bobbin driving shaft, may be displaced axially of saidshaft. The timing of the forward swing ofthe bobbin spindles may becontrolled by a cam or the like'which ensures that the bobbins of therear row clear the A front flyer legs. i

The invention is illustrated in the'accompanying drawings in which Fig.1 is a transverse vertical section, Fig. 2 a fragmentary elevation at180 to Fig. 1 drawn to a larger scale, and Fig. 3 a fragmentary planView;

Fig. 4 is a fragmentary plan view showing a modification.

The roving frame shown in Figs. l 3 is equipped with a front row offlyers 1 and with a rear row of flyers 2, arranged in nonstaggeredrelation,and suspended from front and rear rowsiof spindles 3, 4,respectively, journalled in a fixed overhead rail 5. 6 de notes thebobbin lifter rail which. is adapted to be tilted about the axis of ahorizontal bobbin driving shaft 7 between normal or operative positionas shown in full lines in Fig. 1 in which front and rear rows of bobbinspindles 8, 9 upstanding from the rail 6 are disposed in coaxialrelation, respectively, with the flyer spindles 3, 4: and the positionshown in dotted lines in Fig. 1 and in full lines in Fig. 2 in which thebobbin spindles 8, 9 are inclined forwardly clear of theflyers .1, 2 topermit doffing and reloading.

For effecting tilting movements of the bobbin lifter rail 6 there isattached to said rail, concentric with the shaft 7 a toothed segment 10(Fig. 2) meshing with a WOIIII. 11 on a shaft 12 journalled in thelifter bracket 6 and rotatable by means of a handwheel 13. p

14, 15 denotes the "bobbins which are positively driven from the shaft 7through gearing of known form carried bythe rail '6 as shown best inFigs. 1 and 3, the bobbins be ing im'paled'onthe spindles 8, 9 which arecarried by bobbin-drivers 16 presenting driving pegs 17 engageable bysockets. 18 in .the bases of the bobbins.

The flyer spindles 3, 4 are journalled in ball bearings 19, 20 and eachflyer spindle carries a gear pinion 21 meshing with a gear pinion 22 ona flyer driving shaft 23.

When the frame is stopped prior to doffing, in case the arrestedposition of the flyers is such that the flyers obstruct tilting movementof the bobbins, the flyers must be rotated to clear the bobbins; themain drive to the shaft 23 being disconnected, the operative may correctthe position of all of the flyers simultaneously by simple manualrotation of any one flyer. If the shaft 23 is belt driven, the drive maybe disconnected by a simple-belt-shift operation.

In correcting the positions of the flyers prior to dofiing, the flyersare preferably rotated reversely so that sufiicient slack rove iswithdrawn from the bobbins to allow the bobbins to be tilted forwardlyinto dofling position without straining the rove.. When the bobbins'arein dofiing position, each rove yarn is brokenlin the usual manner beforethe relative bobbin is doffed. p

.As will readily be understood, thefieon struction according to theinvention permits the drawing roller indicated at 24.to be so located asto make the rove ends 25, 26 leading, respectively, to the front andrearfiyers, substantially equal. The importance of this feature will beappreciated by those skilled in the art.

While we have shown the bobbin spindles as being rotatable, it is to beunderstood that the bobbin spindles 8, 9 may be non-rotatable and act ascarriers for the bobbins and the bobbin-drivers. V i

In the modification shown in Fig. 4 the bobbin spindles of each row arestaggered relatively to the bobbin spindles of the other row, and, toenable the bobbins of therear row to clear the front fiyer legs whendotting, the bobbin lifter rail 6, in addition to being tiltable aboutthe axis of the shaft 7, is adapted to be displaced axially of the shaft7 whereby to permit the bobbins of the rear row to be swung forwardlythrough the legs of the front fiyers. To this end, there is fixed to thelifter rail 6 an upstanding follower pin 27 adapted, when the rail 6 isdisplaced endwise, to track a cam slot 28 presented by a bracket 29fixed to the lifter bracket 6 and'overhanging the rail 6, the cam slot28 being oblique to the axis of the shaft 7 so that endwise movement of"the rail 6 is accompanied by tilting movement of said rail 6. The rail6 is provided with a segmental rack 30 concentric with the carryingspindles, and adapted to be tilted about the axis of said bobbin-drivingshaft.

" 2. A roving frame as claimed in claim 1 in which the bobbinlifter railis movable axially of the. bobbin-driving shaft. 3..Aroving frame asclaimed in claim 1 having means for imparting tilting movement to thebobbin lifter rail, said means comprising a manually operable wormmeshing with a toothed segment attached to the bobbin lifter rail. v

In testimony whereof we have signed our names to this specification.

. GORDON FRASER. NORMAN FRASER.

JOHN FRASER.

shaft 7 and engaged by a Worm 31 operable,

by means of a handwheel 32 and journalled in a bracket 33 carried by thelifter bracket 6 As will readily be understood, the construction is suchthat endwise movement imparted to the rail 6 by rotation of thehandwheel 32 is accompanied by tilting movement of the rail 6 by virtueof thecircumstance that the pin 27 is constrained to track the cam slot28.

